TY - JOUR
T1 - Majorana bound state manipulation by current pulses
AU - Lankhorst, Martijn
AU - Jansen, Thies
AU - Brinkman, Alexander
AU - Golubov, Alexander
N1 - IoP deal
Funding Information:
This study was supported by a PHS grant from the National Institute of Health, Bethesda, MD (DK07721-06) and a Veterans Administration career development award. We thank Ms. Linda Jackson at Northwest Kidney Center (Seattle, WA, USA) for her invaluable assistance in abstracting data.
Publisher Copyright:
© 2021 IOP Publishing Ltd.
PY - 2021/2/4
Y1 - 2021/2/4
N2 - Majorana bound states (MBSs) can occur in Josephson junctions of conventional s-wave superconductors coupled via a strong topological insulator. In configurations of multiple line junctions meeting at a point, the criterion for the MBS to exist coincides with the presence of a fractional Josephson vortex with 2π phase winding. We investigate the dynamic stability of such vortices in arrays of tri- and quad-junctions. The existence of fractional vortices in arrays is demonstrated, but the dynamic stability is found to depend critically on the current-phase relation and the inductance. We propose the idea, and study the feasibility, of manipulating the location of the vortices in arrays by using current pulses, compatible with rapid single flux quantum technology. It is shown theoretically, using a modified resistively shunted junction model, that braiding operations can be achieved using current pulses injected from the edge of the array. It is necessary to use vortex sites with elevated critical current as traps.
AB - Majorana bound states (MBSs) can occur in Josephson junctions of conventional s-wave superconductors coupled via a strong topological insulator. In configurations of multiple line junctions meeting at a point, the criterion for the MBS to exist coincides with the presence of a fractional Josephson vortex with 2π phase winding. We investigate the dynamic stability of such vortices in arrays of tri- and quad-junctions. The existence of fractional vortices in arrays is demonstrated, but the dynamic stability is found to depend critically on the current-phase relation and the inductance. We propose the idea, and study the feasibility, of manipulating the location of the vortices in arrays by using current pulses, compatible with rapid single flux quantum technology. It is shown theoretically, using a modified resistively shunted junction model, that braiding operations can be achieved using current pulses injected from the edge of the array. It is necessary to use vortex sites with elevated critical current as traps.
KW - UT-Hybrid-D
KW - Josephson vortex
KW - Rapid single flux quantum
KW - Topological quantum computing
KW - Topological superconductivity
KW - Josephson junction array
KW - topological superconductivity
KW - rapid single flux quantum
KW - topological quantum computing
UR - http://www.scopus.com/inward/record.url?scp=85102105665&partnerID=8YFLogxK
U2 - 10.1088/1361-6668/abdd7f
DO - 10.1088/1361-6668/abdd7f
M3 - Article
AN - SCOPUS:85102105665
VL - 34
JO - Superconductor science and technology
JF - Superconductor science and technology
SN - 0953-2048
IS - 3
M1 - 035024
ER -